Two hymns,"I am so glad that our Father in heaven," and "Sowing the seed by the daylight [dawnlight] fair," (sometimes given as "Sowing our seed in the morning fair") are usually attributed to Mr. Bliss. In his Gospel Songs, Cincinnati, 1874, however, he lays claim to the music only. Mr. Sankey attributes this last to " E. A. Oakey." With the exception of No. 48, these hymns are given in Mr. Sankey's Sacred Songs & Solos, Pts. i. and ii. Their popularity is far beyond their literary merits, and is mainly due to the simple melodies to which they are wedded. As a writer of hymns of this class Mr. Bliss is second only to Mrs. Van Alstyne. Many anecdotes concerning hymns of this class are given in American Evangelists; an Account of their work in England and America, by the Rev. Elias Nason, Boston, U.S., Lathrop & Co., 1877.
Mr. Bliss is usually known as "P. P. Bliss." This is found on the title-pages of his collections. On his own authority, however, we are enabled to say that his name originally stood thus: “Philipp Bliss.” Early in life he separated the final p from his Christian name, constituted it a capital P, and thus produced "P. P. Bliss." (For this article we are mainly indebted to Professor F. M. Bird, and Mr. H. P. Main.)
-John Julian, Dictionary of Hymnology (1907)